Question

you are standing 8 metre away from the mirror placed in front of you and your mum is standing 3 behind you what will be the distance between you and your mother image if you move 3 metre towards the mirror

Answer 1

Given:

You are standing 8 metre away from the mirror placed in front of you and your mum is standing 3m behind you.

To find:

Distance between you and your mother image if you move 3 metre towards the mirror.

Calculation:

The following image characteristics by plane mirror must be remembered:

• Image is virtual.
• Image is erect.
• Image is same size as that of object.
• Image distance is equal to object distance.

Distance between me and the mirror after moving 3 m towards the mirror :

$\therefore \: d1 = 8 - 3 = 5 \: m$

Now , distance of mom's image from mirror:

$\therefore \: d2 = mom \: image \: distance$

$= > \: d2 = mom \: object \: distance$

$= > \: d2 = (my \: distance \: from \: mirror )+ (mom \: distance \: from \: me)$

$= > \: d2 =8+3$

$= > \: d2 =11 \: m$

So, distance between me and mom's image:

$\therefore \: d = d1 + d2$

$= > \: d = 5 + 11$

$= > \: d = 16 \: m$

So , required distance = 16 m.